In a class experiment 5.0 of ethanol (CH₃CH₂OH) was completely burnt and all the heat evolved was used to heat 500cm³ of water from 20⁰C to 80⁰C. Given that the specific heat capacity of water is 4.2j/g/k and the density of water is 1g/cm³.

(i) Write the equation to show the reaction that takes place when ethanol is burnt ( 1 mk)

(ii) Calculate the heat energy observed by water ( 2 mks)

(iii) Find the molar heat of combustion of ethanol ( 1 mk)

C= 12 (H= 1) (O= 16)